Hello!
How to kill poison ivy?
Last year I dug it up with its roots, but probably not enough; this spring it is growing again.

How much of it? How big is the plant now?

https://extension.uga.edu/publ...

5 hearths in my garden plot. they are small for now

Picture?
I usually just hand pull.
When I have a good bit of ground covered, and the vines are rooting, I go after it with a mattock, pile up and allow the sun to cook.



Usually pretty easy. Not like wisteria or japanese honeysuckle.

Of course... if you're allergic... might not be the solution that it is for me.

so maybe you did not get all the roots first time.

If practical at the location, boiling water should kill it. An older, established root system could need multiple applications, and/or a little moat dug around it so the heat really penetrates the specific area where the roots are.